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Tomography reconstruction of beams extracted from an ion source
Review of Scientific Instruments ( IF 1.6 ) Pub Date : 2019-12-01 , DOI: 10.1063/1.5129786
S Saminathan 1 , F Ames 1 , R Baartman 1 , M Marchetto 1 , O Lailey 2 , A Mahon 3
Affiliation  

Commissioning of the CANREB (CANadian Rare isotope facility with Electron Beam ion source) system and its associated beamlines has recently begun at TRIUMF. At the head of this beamline is an ion source used to produce stable alkaline ions with energy up to 60 keV for the CANREB system. Throughout commissioning, it is essential to have a means of verifying beam quality and ensuring that the required beam parameters along the beamline are met. This is accomplished using tomography reconstruction, which consists of taking one-dimensional scans at different projections and reconstructing an image of the beam in two dimensions using the maximum entropy algorithm. Tomography enables the visualization of the shape of the beam as well as the investigation into the possible presence of aberrations. Initially, tomography reconstruction is performed by using simulated beam profiles at the measurement locations and is then performed by using measured beam profiles. Additionally, these measurements are benchmarked by fitting the initial beam parameters in our beam optics model, and the results are presented.

中文翻译:

从离子源提取的射束的断层扫描重建

CANREB(具有电子束离子源的加拿大稀有同位素设施)系统及其相关光束线的调试最近已在 TRUMF 开始。该光束线的前端是一个离子源,用于为 CANREB 系统产生能量高达 60 keV 的稳定碱性离子。在整个调试过程中,必须有一种方法来验证光束质量并确保满足沿光束线所需的光束参数。这是使用断层扫描重建完成的,它包括在不同投影处进行一维扫描并使用最大熵算法在二维中重建光束图像。断层扫描可以使光束的形状可视化并调查可能存在的像差。原来,断层扫描重建是通过在测量位置使用模拟光束轮廓进行的,然后通过使用测量的光束轮廓进行。此外,通过在我们的光束光学模型中拟合初始光束参数来对这些测量进行基准测试,并给出结果。
更新日期:2019-12-01
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